Improvement in pulleys



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GEORGE B. OOWLES, OF BRIDGEPORT, CONNECTICUT.

Letters Patent No. 104,119, dated Janie 14, 1870.

IMPROVEMENT IN PULLEYS.

The Schedule referred to in these Lettera Patent and making part of thesame.

I, GEORGE B. COWLES, of Bridgeport, county of Fairfield, State ofConnecticut, have invented certain Improvements in Pulleys, of which thefollowing is a specification. I

Nature and Object of my Invention.

To construct a metallic pulley, whose frame shall he in one piece,combining the axle for sheave to roll upon, or forming the bearing foraxle of sheavc, the same being cast thereto.

Description of Accompanying Drawing.

Figure 1 is a front View of my'invention.

Figure 2 is a section of frame with sheave.

Figure 3 is a cross-section of saine.

General Description..

a, figs. l and 2, the frame of the pulley.

b, the sheave.

c, the axle.

d d d, the flange of sheave.

I construct my invention as follows:

I cast the sheave solid in center, and with the flange broken, as shownat d (l d, to facilitate molding. I then drill out the c'entelyinakiug atrue and perfect surface to bear on the axle. vThe sheave is then set ina core or forming-box, whose form corresponds to the opening desired inframe; the space around sheave and box is then filled with core-sand auddried in the usual way, leaving the hole in center of sheave open.

The frame is molded in the common method, and

the coro with sheave is set intothe mold, the molten metal is then runinto the mold, lliug the space around the core and running through thesheave; as soon as the metal is set the casting is taken from the sand,the core cleaned out, and the pulley is complete.

If desired, the a-Xle can be formed on the sides of sheaves, and let themeta-l till around ends of bearing.

The advantages of my invention are readily understood. y

First, I can dispense with all rivets, screws, or clamps to hold theframe together.

Second, the axle, bein g run' through the drilled hole in sheave,becomes chilled audhard, also very smooth and true, at the same time,being more certain of its being square with frame.

Third, there is no posibility o f the frame or its parts being sprungand liable to be broken in riveting or screwing together. Y

Fourth,'its simplicitylessens the cost nearly ouehalf ofthe commonInode.

7that I claim as my invention, and desire to secure by Letters Patent,is

1. The pulley-frame (t and axle c entire, and constructed as specifiedand shown. v

2. The sheave b, with its broken flanges d (l il, in combination withframe a audaxle c, for the purpose specified and shown.

GEO. B. COWLES.

Witnesses:

Snuuwoon STERLING, A. SKAAT.

